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|
{- |
Example for usage of pickler functions
to de-/serialise from/to XML
Example data is taken from haskell wiki
http://www.haskell.org/haskellwiki/HXT/Practical/Simple2
-}
module Main
where
import Data.Map (Map, fromList, toList)
import Text.XML.HXT.Core
-- Example data taken from:
-- http://www.ibiblio.org/xml/books/bible/examples/05/5-1.xml
-- ------------------------------------------------------------
-- the data modell
data Season = Season
{ sYear :: Int
, sLeagues :: Leagues
}
deriving (Show, Eq)
type Leagues = Map String Divisions
type Divisions = Map String [Team]
data Team = Team
{ teamName :: String
, city :: String
, players :: [Player]
}
deriving (Show, Eq)
data Player = Player
{ firstName :: String
, lastName :: String
, position :: String
, atBats :: Maybe Int
, hits :: Maybe Int
, era :: Maybe Float
}
deriving (Show, Eq)
-- ------------------------------------------------------------
-- the pickler instance declarations
-- in this case just for uniform naming
instance XmlPickler Season where
xpickle = xpSeason
instance XmlPickler Team where
xpickle = xpTeam
instance XmlPickler Player where
xpickle = xpPlayer
-- ------------------------------------------------------------
-- for every data type there is a pickler
-- the XML root element
xpSeason :: PU Season
xpSeason
= xpElem "SEASON" $
xpWrap ( uncurry Season
, \ s -> (sYear s, sLeagues s)) $
xpPair (xpAttr "YEAR" xpickle) xpLeagues
xpLeagues :: PU Leagues
xpLeagues
= xpWrap ( fromList
, toList ) $
xpList $
xpElem "LEAGUE" $
xpPair (xpAttr "NAME" xpText) xpDivisions
xpDivisions :: PU Divisions
xpDivisions
= xpWrap ( fromList
, toList
) $
xpList $
xpElem "DIVISION" $
xpPair (xpAttr "NAME" xpText)
xpickle
xpTeam :: PU Team
xpTeam
= xpElem "TEAM" $
xpWrap ( uncurry3 Team
, \ t -> (teamName t, city t, players t)
) $
xpTriple (xpAttr "NAME" xpText)
(xpAttr "CITY" xpText)
(xpList xpickle)
xpPlayer :: PU Player
xpPlayer
= xpElem "PLAYER" $
xpWrap ( \ ((f,l,p,a,h,e)) -> Player f l p a h e
, \ t -> (firstName t, lastName t
, position t, atBats t
, hits t, era t
)
) $
xp6Tuple (xpAttr "GIVEN_NAME" xpText)
(xpAttr "SURNAME" xpText)
(xpAttr "POSITION" xpText)
(xpOption (xpAttr "AT_BATS" xpickle))
(xpOption (xpAttr "HITS" xpickle))
(xpOption (xpAttr "ERA" xpPrim ))
-- ------------------------------------------------------------
-- a simple pickle/unpickle application
main :: IO ()
main
= do
runX ( xunpickleDocument xpSeason [ withValidate no
, withTrace 1
, withRemoveWS yes
, withPreserveComment no
] "simple2.xml"
>>>
processSeason
>>>
xpickleDocument xpSeason [ withIndent yes
] "new-simple2.xml"
)
return ()
-- the dummy for processing the unpickled data
processSeason :: IOSArrow Season Season
processSeason
= arrIO ( \ x -> do {print x ; return x})
-- ------------------------------------------------------------
-- the internal data of "simple2.xml"
season1998 :: Season
season1998
= Season
{ sYear = 1998
, sLeagues = fromList
[ ( "American League"
, fromList
[ ( "Central"
, [ Team { teamName = "White Sox"
, city = "Chicago"
, players = []}
, Team { teamName = "Royals"
, city = "Kansas City"
, players = []}
, Team { teamName = "Tigers"
, city = "Detroit"
, players = []}
, Team { teamName = "Indians"
, city = "Cleveland"
, players = []}
, Team { teamName = "Twins"
, city = "Minnesota"
, players = []}
])
, ( "East"
, [ Team { teamName = "Orioles"
, city = "Baltimore"
, players = []}
, Team { teamName = "Red Sox"
, city = "Boston"
, players = []}
, Team { teamName = "Yankees"
, city = "New York"
, players = []}
, Team { teamName = "Devil Rays"
, city = "Tampa Bay"
, players = []}
, Team { teamName = "Blue Jays"
, city = "Toronto"
, players = []}
])
, ( "West"
, [ Team { teamName = "Angels"
, city = "Anaheim"
, players = []}
, Team { teamName = "Athletics"
, city = "Oakland"
, players = []}
, Team { teamName = "Mariners"
, city = "Seattle"
, players = []}
, Team { teamName = "Rangers"
, city = "Texas"
, players = []}
])
])
, ( "National League"
, fromList
[ ( "Central"
, [ Team { teamName = "Cubs"
, city = "Chicago"
, players = []}
, Team { teamName = "Reds"
, city = "Cincinnati"
, players = []}
, Team { teamName = "Astros"
, city = "Houston"
, players = []}
, Team { teamName = "Brewers"
, city = "Milwaukee"
, players = []}
, Team { teamName = "Pirates"
, city = "Pittsburgh"
, players = []}
, Team { teamName = "Cardinals"
, city = "St. Louis"
, players = []}
])
, ( "East"
, [ Team { teamName = "Braves"
, city = "Atlanta"
, players =
[ Player { firstName = "Marty"
, lastName = "Malloy"
, position = "Second Base"
, atBats = Just 28
, hits = Just 5
, era = Nothing}
, Player { firstName = "Ozzie"
, lastName = "Guillen"
, position = "Shortstop"
, atBats = Just 264
, hits = Just 73
, era = Nothing}
, Player { firstName = "Danny"
, lastName = "Bautista"
, position = "Outfield"
, atBats = Just 144
, hits = Just 36
, era = Nothing}
, Player { firstName = "Gerald"
, lastName = "Williams"
, position = "Outfield"
, atBats = Just 266
, hits = Just 81
, era = Nothing}
, Player { firstName = "Tom"
, lastName = "Glavine"
, position = "Starting Pitcher"
, atBats = Nothing
, hits = Nothing
, era = Just 2.47}
, Player { firstName = "Javier"
, lastName = "Lopez"
, position = "Catcher"
, atBats = Just 489
, hits = Just 139
, era = Nothing}
, Player { firstName = "Ryan"
, lastName = "Klesko"
, position = "Outfield"
, atBats = Just 427
, hits = Just 117
, era = Nothing}
, Player { firstName = "Andres"
, lastName = "Galarraga"
, position = "First Base"
, atBats = Just 555
, hits = Just 169
, era = Nothing}
, Player { firstName = "Wes"
, lastName = "Helms"
, position = "Third Base"
, atBats = Just 13
, hits = Just 4
, era = Nothing}
]}
, Team { teamName = "Marlins"
, city = "Florida"
, players = []}
, Team { teamName = "Expos"
, city = "Montreal"
, players = []}
, Team { teamName = "Mets"
, city = "New York"
, players = []}
, Team { teamName = "Phillies"
, city = "Philadelphia"
, players = []}
])
, ( "West"
, [ Team { teamName = "Diamondbacks"
, city = "Arizona"
, players = []}
, Team { teamName = "Rockies"
, city = "Colorado"
, players = []}
, Team { teamName = "Dodgers"
, city = "Los Angeles"
, players = []}
, Team { teamName = "Padres"
, city = "San Diego"
, players = []}
, Team { teamName = "Giants"
, city = "San Francisco"
, players = []}
])
])
]
}
-- ------------------------------------------------------------
|
